<template>
  <ContentField>
    <div class="row justify-content-md-center">
      <div class="col-3">
        <form @submit.prevent="login">
          <div class="mb-3">
            <label for="username" class="form-label">用户名</label>
            <input type="text" v-model="username" class="form-control" id="username" >
          </div>
          <div class="mb-3">
            <label for="password" class="form-label">密码</label>
            <input type="password" v-model="password" class="form-control" id="password">
          </div>
          <div class="error_message">{{ error_message }}</div>
          <button type="submit"  class="btn btn-primary">登录</button>
        </form>
      </div> 
    </div>
    
  </ContentField>
</template>

<script>
import ContentField from '@/components/ContentField.vue';
import { ref } from 'vue';
import { useStore } from 'vuex';
import router from '../router/index'

export default {
  name: 'LoginView',
  components: {
    ContentField,
  },
  setup() {
    let username = ref('');
    let password = ref('');
    let error_message = ref('');
    const store = useStore();

    const token = localStorage.getItem("token");
    if(token) {
      store.commit("updateToken", token);
      store.dispatch("getinfo", {
        success() {
          router.push({name: 'userlist'});
        }
      })
    }
    const login = () => {
      store.dispatch("login", {
        username: username.value,
        password: password.value,
        success() {
          store.dispatch("getinfo", {
            success() {
              router.push({name: 'userlist'});
            }
          })
        }
      })
    }
    return {
      username,
      password,
      error_message,
      login,
    }
  }
}
</script>

<style scoped>
button {
  width: 100%;
}

.error_message {
  color: red;
}
</style>